“A tantalizing erotic piece portraying a determined male wearing a black kimono who is about to penetrate the enticed female passenger.”
The masked bandit, who is sitting in the portable litter (kago), is observing the activities of his acquaintance.
Reference: p.374 (Fig.13) in ‘Japonese Erotic Art, the Hidden World of Shunga’ by Ofer Shagan
Antique Japanese color woodblock. Shunga (Erotic print).